With regard to any real property loan originated by a lender other than a Federal savings association, as a matter of contract between it and the borrower, the lender has the power to include a due on sale clause in its loan instrument.

Except as otherwise provided in paragraph (c) of this section and § 191.5 of this part, the exercise of due-on-sale clauses in loans originated by lenders other than Federal savings associations shall be governed exclusively by the terms of the loan contract, and all rights and remedies of the lender and the borrower shall be fixed and governed by that contract.

In the case of a window-period loan, the provisions of paragraph (b) of this section shall apply only in the case of a sale or transfer of the property subject to the real property loan and only if such sale or transfer occurs on or after October 15, 1985: Provided, That:

With respect to real property loans originated in a state by lenders other than national banks, Federal savings associations, and Federal credit unions, a state may otherwise regulate such contracts by state law enacted prior to October 16, 1985, in which case paragraph (b) of this section shall apply only if such state law so provides; and

With respect to real property loans originated by national banks and Federal credit unions, the OCC or the National Credit Union Administration Board, respectively, may otherwise regulate such contracts by regulations promulgated prior to October 16, 1985, in which case paragraph (b) of this section shall apply only if such regulation so provides.

A lender may not exercise its options pursuant to a due-on-sale clause contained in a window-period loan in the case of a sale or transfer of property securing such loan where the sale or transfer occurred prior to October 15, 1982.

Prior to the sale or transfer of property securing a window-period loan subject to the provisions of paragraph (c) of this section.

Any lender in the business of making real property loans may require any successor or transferee of the borrower to supply credit information customarily required by the lender in connection with credit applications, to complete its customary credit application, and to meet customary credit standards applied by such lender, at the date of sale or transfer, to the lender's similar loans secured by similar property.

Any lender not in the business of making loans may require any successor or transferee of the borrower to meet credit standards customarily applied by other similarly situated lenders or sellers in the geographic market within which the transaction occurs, for similar loans secured by similar property, prior to the lender's consent to the transfer.

The lender may exercise a due-on-sale clause in a window-period loan if:

The successor or transferee of the borrower fails to meet the lender's credit standards as set forth in paragraphs (b)(1)(i) and (b)(1)(ii) of this section; or

Upon transfer of the security property and not later than fifteen days after written request by the lender, the successor or transferee of the borrower fails to provide information requested by the lender pursuant to paragraph (d)(1)(i) or (d)(1)(ii) of this section, to determine whether such successor or transferee of the borrower meets the lender's customary credit standards.

The lender shall, within thirty days of receipt of a completed credit application and any other related information provided by the successor or transferee of the borrower, determine whether such successor or transferee meets the customary credit standards of the lender and provide written notice to the successor or transferee of its decision, and the reasons in the event of a disapproval. Failure of the lender to provide such notice shall preclude the lender from exercise of its due-on-sale clause upon the sale or transfer of the property securing the loan.

The lender's right to exercise a due-on-sale clause pursuant to this paragraph (d)(4) is in addition to any other rights afforded the lender by state law regulating window-period loans with regard to the exercise of due-on-sale clauses and loan assumptions.